99chambers

Massachusetts State Senate seat · lines in effect since 2022

Massachusetts State Senate: Norfolk and Plymouth District

A district of about 178,000 people, 47% of adults with a bachelor's degree. It votes D+17.0 relative to the nation for president.

John Keenan (D) · since Nov 2, 2010Next election Nov 7, 2028The 2026 race →

Where it sits among all 40 seats

Every Massachusetts State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.

D+17.029th most
Democratic
Most DemocraticMost Republican21st seat · the majority lineDistrict D32

Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Every race on these lines

Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.

2022
Massachusetts State SenateD+27.3

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM ET

Who lives here, compared

Grey bars show the spread of all 40 seats. Small marks are other seats in Massachusetts. The black marker is District D32.

Adults with a bachelor's degree47% 46th pct · 22nd of 40 in MA

Lower than 54% of seats.

White adults without a degree35% 54th pct · 19th of 40 in MA

Higher than 54% of seats.

Hispanic residents6% 26th pct · 30th of 40 in MA

Lower than 74% of seats.

Black residents5% 64th pct · 15th of 40 in MA

Higher than 64% of seats.

Asian residents20% 100th pct · 1st of 40 in MA

Highest of 40 seats.

People per square mile2,394 69th pct · 13th of 40 in MA

Denser than 69% of seats.

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET

Seats most like this one

Nearest seats on demographics, density and lean.

District D11
34% college gradsD+13.6Held DDistrict D08
49% college gradsD+22.6Held DDistrict D23
57% college gradsD+34.4Held DDistrict D16
58% college gradsD+34.5Held D

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Who has held it

These lines took effect in 2022.

  1. John F. Keenan (D)
    2023– · Won 2022 by 27.3, 2024 unopposed, 2026 by 46.1

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)